Cov xwm txheej tam sim no ntawm kev kho kom zoo nkauj

Precast qhob tau dhau los ua kev nyiam tshiab hauv kev tsim kho nrog nws tus nqi qis thiab kev ua tau zoo. Cov qauv ntau, cov tes taw hnyav, thiab kev ua tau zoo heev ua rau nws siv dav hauv phab ntsa, phab ntsa, kev tsim kho sab nrauv, kev tsim kho sab nrauv, tsim kho sab nrauv thiab kho kom zoo nkauj.
Precast qhob muaj peev xwm nrawm ntawm kev ceev ntawm cov chaw muaj kev lag luam thiab yog ib qho ntawm cov ntsiab lus tseem ceeb ntawm kuv lub teb chaws txoj kev lag luam system.